package com.nlp.visualization.utils;

/**
 * Created by LXM on 2017/10/28.
 *
 * @author LXM
 * @version 1.0
 * @description 密码转MD5
 * @datetime 17:10
 */

import java.security.MessageDigest;

public class MD5Util {

  public final static String MD5(String s) {
    char hexDigits[] = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E',
        'F'};
    try {
      byte[] btInput = s.getBytes();
      // 获得MD5摘要算法的 MessageDigest 对象
      MessageDigest mdInst = MessageDigest.getInstance("MD5");
      // 使用指定的字节更新摘要
      mdInst.update(btInput);
      // 获得密文
      byte[] md = mdInst.digest();
      // 把密文转换成十六进制的字符串形式
      int j = md.length;
      char str[] = new char[j * 2];
      int k = 0;
      for (int i = 0; i < j; i++) {
        byte byte0 = md[i];
        str[k++] = hexDigits[byte0 >>> 4 & 0xf];
        str[k++] = hexDigits[byte0 & 0xf];
      }
      return new String(str);
    } catch (Exception e) {
      e.printStackTrace();
      return null;
    }
  }

}